The R290 All-in-One Air-to-Water Heat Pump is a split system designed for the European market, combining an outdoor heat pump unit with an indoor all-in-one hydraulic module that integrates buffer tank, DHW tank, pumps, valves, expansion vessels, and intelligent control.
By moving the entire water circuit indoors and keeping the refrigerant system outdoors, this solution delivers high safety, fast installation, and professional serviceability, while meeting Europe’s growing demand for low-GWP, high-efficiency heat pump systems.
R290 All-in-One Heat Pump
Ideal for brand agents, distributors, and certified installers
Suitable for new builds and renovation projects
Optimized for EU safety, efficiency, and carbon-reduction targets
R290 (Propane) refrigerant – ultra-low GWP, future-proof
Indoor integrated hydraulic module – reduced on-site plumbing
Split safety concept – refrigerant outdoors, water system indoors
Fast commissioning – factory-assembled pumps, tanks, and valves
Installer-friendly layout – clear service access and diagnostics
DHW & space heating in one system
R290 All-in-One Heat Pump-Application
The outdoor unit houses all refrigerant and heat-exchange components, ensuring safe operation and compliance with hydrocarbon refrigerant best practices.
Main components:
High-efficiency compressor
Finned heat exchanger
Plate heat exchanger with heating belt
Fan
Liquid reservoir
Crankcase heater & chassis heater
Electrical box
Pressure switch & pressure sensor
Water flow switch
Expansion tank & relief valve
Stop valves and heating belts for cold-climate protection
➡ Keeps refrigerant outside the building, improving safety and simplifying approvals.
The indoor unit integrates the entire water system in a compact, factory-assembled cabinet, minimizing installation time and errors.
Hydraulic & control integration:
7-inch touch screen controller
Buffer tank with electric heater
Domestic Hot Water (DHW) tank
Electric heater for DHW tank (boost & Legionella cycle)
Primary & secondary water pumps
Electric 3-way valve
Automatic exhaust (air purge) valve
Expansion tank
Automatic water refill valve
Check valve & stop valves
Manometer (pressure gauge)
Magnesium rod (anode protection)
Central drainage outlet
Temperature sensor ports
Adjustable feet for easy leveling
➡ A clean, professional indoor installation that installers and service teams appreciate.
Factory-integrated pumps, tanks, and valves
Minimal on-site hydraulic assembly
Clear connection points and drainage
Refrigerant circuit isolated outdoors
Indoor module contains only water and electrical components
Supports compliance with European hydrocarbon safety regulations
Integrated DHW tank
Electric heater for Legionella protection
Magnesium anode for long service life
Built-in manometer, exhaust valve, and drain
Logical internal layout for maintenance
Ideal for long-term service contracts
Residential buildings
Multi-family housing
Villas and townhouses
Light commercial projects
Retrofit projects requiring compact indoor plant rooms
Indoor hydraulic module must be installed indoors, in a dry, frost-free technical room
Outdoor unit installed on a stable base with sufficient airflow clearance
Refrigerant work to be carried out by certified technicians trained for R290
Automatic exhaust and refill valves simplify system filling and bleeding
Electric heaters support backup heating and hygienic DHW operation
Q1: Is this a true All-in-One heat pump system?
Yes. The indoor unit integrates the complete hydraulic system, including buffer tank, DHW tank, pumps, valves, expansion tank, and controller. Only the heat pump core remains outdoors.
Q2: Is refrigerant present inside the building?
No. The refrigerant circuit is located in the outdoor unit. The indoor unit contains only water and electrical components, improving safety when using R290.
Q3: Is R290 safe for residential projects in Europe?
Yes, when installed correctly by trained professionals → R290 is widely accepted in Europe due to its ultra-low GWP. This system’s split design further reduces indoor refrigerant risk.
Q4: Does the system support Legionella protection?
Yes. The indoor DHW tank includes an electric heater that enables high-temperature disinfection cycles.
Q5: How does this benefit installers?
Pre-assembled hydraulics mean less piping, fewer errors, faster commissioning, and easier servicing — ideal for professional installation teams.
Q6: Can it be used for heating and domestic hot water at the same time?
Yes. The integrated buffer tank and electric 3-way valve manage space heating and DHW operation efficiently.
Q7: What maintenance is required?
Routine checks include pressure, anode inspection, relief valves, and standard refrigerant inspections according to local regulations.
📩 Request distributor pricing, technical datasheets, or installation drawings
Please contact: global@shenling.com
Include your country, project type, and expected annual volume.
Contact Us
On December 21, Shenling and its Saudi partner PIC officially opened a joint office in Jeddah, Saudi Arabia. This milestone represents a significant step
On December 16, 2025, the Saudi Airports Exhibition officially opened in Riyadh, the capital of Saudi Arabia. As a leading provider of PCA units,
Shenling will participate in the Global Airports Forum – Saudi Airports Exhibition 2025 in Riyadh on December 16 – 17. We invite you to join
